/*
 *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#include "vcm_capture.h"
#include "rtc_base/ref_counted_object.h"

#include <stdint.h>

#include <memory>

#include "modules/video_capture/video_capture_factory.h"
#include "rtc_base/checks.h"
#include "rtc_base/logging.h"


VcmCapturer::VcmCapturer() : vcm_(nullptr) {}

bool VcmCapturer::Init(size_t width,
                       size_t height,
                       size_t target_fps,
                       size_t capture_device_index) {
    std::unique_ptr<VideoCaptureModule::DeviceInfo> device_info(
            VideoCaptureFactory::CreateDeviceInfo());

    char device_name[256];
    char unique_name[256];
    if (device_info->GetDeviceName(static_cast<uint32_t>(capture_device_index),
                                   device_name, sizeof(device_name), unique_name,
                                   sizeof(unique_name)) != 0) {
        Destroy();
        return false;
    }

    vcm_ = webrtc::VideoCaptureFactory::Create(unique_name);
    if (!vcm_) {
        return false;
    }
    vcm_->RegisterCaptureDataCallback(this);

    device_info->GetCapability(vcm_->CurrentDeviceName(), 0, capability_);

    capability_.width = static_cast<int32_t>(width);
    capability_.height = static_cast<int32_t>(height);
    capability_.maxFPS = static_cast<int32_t>(target_fps);
    capability_.videoType = VideoType::kI420;

    if (vcm_->StartCapture(capability_) != 0) {
        Destroy();
        return false;
    }

    RTC_CHECK(vcm_->CaptureStarted());

    return true;
}

VcmCapturer* VcmCapturer::Create(size_t width,
                                 size_t height,
                                 size_t target_fps,
                                 size_t capture_device_index) {
    std::unique_ptr<VcmCapturer> vcm_capturer(new VcmCapturer());
    if (!vcm_capturer->Init(width, height, target_fps, capture_device_index)) {
        RTC_LOG(LS_WARNING) << "Failed to create VcmCapturer(w = " << width
                            << ", h = " << height << ", fps = " << target_fps
                            << ")";
        return nullptr;
    }
    return vcm_capturer.release();
}

void VcmCapturer::Destroy() {
    if (!vcm_)
        return;

    vcm_->StopCapture();
    vcm_->DeRegisterCaptureDataCallback();
    // Release reference to VCM.
    vcm_ = nullptr;
}

VcmCapturer::~VcmCapturer() {
    Destroy();
}

void VcmCapturer::OnFrame(const VideoFrame& frame) {
    RTC_LOG(LS_VERBOSE) << __FUNCTION__ ;
    VideoCapturer::OnFrame(frame);
}

